/Engine/Plugins/Experimental/GeometryCacheAbcFile/Source/GeometryCacheAbcFile/Public/GeometryCacheAbcFileSceneProxy.h
Update the SampleIndex and MeshData for a given time
true if the SampleIndex and MeshData were updated
virtual bool UpdateMeshData ( float Time, bool bLooping, int32 & InOutMeshSampleIndex, [FGeometryCacheMeshData](API\Plugins\GeometryCache\FGeometryCacheMeshData) & OutMeshData )